JP2004154814A - Material of worked metal sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal sheet which is lightweight and exhibits improved strength or the like by being machined. <P>SOLUTION: A method is provided for manufacturing the metal sheet on the surface of which recessed parts are formed by forming the recessed parts having an optional shape on one or both surfaces of the metal sheet by passing a metal sheet which is heated to not lower than the recrystallization temperature through a pair of rolls on the surface of one or both of which the recessed parts are provided, next, performing rolling of the metal sheet at room temperature or at temperature less than recrystallization temperature, and the metal sheet manufactured by this method is provided. Since the recessed parts are formed on the surface, the weight is lightened, adhesive strength is increased and the application of adhesives, paints, cement, etc. is facilitated, and also since the surface area is increased, effect such as an increase in heat radiating effect is obtained. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a processed metal plate.
[0002]
[Problems to be solved by the invention]
2. Description of the Related Art Rolling, extrusion, drawing, and forging are widely known as methods for performing primary processing on metal materials. This primary processing is mainly for making materials for secondary processing such as plates, bars, profiles, pipes, etc. The characteristic of primary processing is that the amount of deformation is large and the material is improved. It is.
[0003]
The rolling process involves pressing a plate or rod-shaped material between two rotating cylindrical rolls to reduce the thickness or cross-sectional area of the rod, a predetermined cross-sectional shape of a rod, a shape, or a tube. It is known as a method of processing a raw material that gives a homogeneous and tough property while forming a primary processed product having the following characteristics.
[0004]
Rolling is generally classified into hot rolling, which is performed at a temperature higher than the recrystallization temperature, and cold rolling, which is performed at a temperature lower than the recrystallization temperature. This cold rolling usually means rolling at a temperature below the recrystallization temperature, but in the industry may mean rolling at a narrower room temperature.
[0005]
In hot rolling, generally, an intermediate material is rolled at a high temperature and processed to a predetermined size. However, at a high temperature, the deformation resistance of the material is reduced, so that a large deformation can be given and the efficiency is high. However, since hot rolling is a high-temperature working, an oxide film is formed, and it is difficult for the dimensions and shape to be uniform. Therefore, it is said that finishing is performed by cold rolling relatively frequently. When cold rolling is performed at normal temperature, hot rolled material is mainly made of plate material, which is annealed and then rolled to finish it to a specified size, but it has good dimensional accuracy and glossy smooth surface product Is said to be obtained. At present, such a cold-rolled sheet is further annealed to recover workability and used as a material for secondary processing.
[0006]
The plate material manufactured in this way is cut in a zigzag pattern by machining, and at the same time, is expanded and processed into a diamond-shaped or turtle-shaped mesh shape, or convex projections are formed on the surface of the plate material during hot rolling. Are formed to produce a so-called striped plate, which is used on factory floors, roads, stairs of chemical plants, and the like.
[0007]
However, conventional hot rolling and cold rolling use the same material and have the same thickness to achieve weight reduction despite the same thickness, increase adhesive strength, and use adhesives, paints, cement, etc. At present, it is not possible to simultaneously satisfy the needs for conflicting demands such as improving applicability and increasing the surface area.
[0008]
In order to satisfy such needs simultaneously, the present invention has been made to provide a metal plate in which the weight is reduced by mechanically processing the metal plate and the properties thereof are improved, and a method of manufacturing the same. It is the purpose.
[0009]
[Means for Solving the Problems]
In view of the above-mentioned problems, when studying various methods of processing a metal plate, a metal heated to a recrystallization temperature or higher between a pair of rolls provided with a convex portion on one or both surfaces of the rolls was studied. Through the plate, forming a concave portion of any shape on one or both sides of the metal plate, and then rolling at room temperature or lower than the recrystallization temperature, obtained the knowledge that this problem can be solved, and reached the present invention. It is.
[0010]
That is, the present invention forms a concave portion of an arbitrary shape on one or both surfaces of a metal plate by passing a metal plate heated at a recrystallization temperature or higher between rolls having a convex portion on one or both surfaces of a pair of rolls. Then, a method for producing a metal plate having a concave portion on the surface, characterized by rolling at a temperature lower than room temperature or a recrystallization temperature, and a metal having a concave portion formed on the surface produced in this way. It is about a board.
[0011]
That is, the present invention
(1) A metal plate heated to a temperature equal to or higher than the recrystallization temperature is passed between rolls having a convex portion on one or both surfaces of a pair of rolls to form a concave portion of an arbitrary shape on one or both surfaces of the metal plate. Then, rolling is performed at a temperature lower than room temperature or lower than the recrystallization temperature. A method for producing a processed metal sheet having a concave portion formed on a surface thereof.
(2) The method for producing a processed metal sheet having a concave portion formed on a surface thereof, wherein the metal sheet is rolled at room temperature in (1).
(3) The method for producing a processed metal plate having a concave portion formed on the surface thereof according to (1), wherein the metal plate is a metal selected from the group consisting of iron, copper and aluminum or an alloy thereof.
(4) The method according to (3), wherein the metal plate is selected from the group consisting of a steel plate, a stainless steel plate, a copper plate, a brass plate, and a duralumin plate. .
(5) A metal plate heated to a recrystallization temperature or higher is passed between rolls having a convex portion on one or both surfaces of a pair of rolls to form a concave portion of an arbitrary shape on one or both surfaces of the metal plate; Next, a processed metal sheet having a concave portion formed on a surface obtained by rolling at a temperature lower than a normal temperature or a recrystallization temperature.
(6) The processed metal sheet according to (5), wherein the rolling process temperature is normal temperature, the concave portion being formed on the surface.
(7) The processed metal plate according to (5) or (6), wherein the metal plate is a metal selected from the group consisting of iron, copper and aluminum or an alloy thereof.
(8) The processed metal plate according to (5) to (7), wherein the metal plate is selected from the group consisting of a steel plate, a stainless steel plate, a copper plate, a brass plate, and a duralumin plate.
It is about.
[0012]
The invention of the present application is an invention of a method for manufacturing a processed metal plate according to claims 1 to 4 (hereinafter, sometimes referred to as a first invention) and an invention of a processed metal plate of claims 5 to 8 (hereinafter, referred to as a first invention). 2). However, the first invention and the second invention are not particularly distinguished from each other, and may be referred to as the present invention.
[0013]
In the method for manufacturing a processed metal sheet of the first invention, first, in the first half of the process, a metal sheet heated to a recrystallization temperature or higher is passed through a roll provided with a convex portion on one or both surfaces of a pair of rolls. A concave portion of an arbitrary shape is formed on one or both sides of the plate by a convex portion of a roll. This manufacturing process is performed by so-called hot rolling performed at a temperature equal to or higher than the recrystallization temperature, and a concave portion is formed between rolls having convex portions on one or both surfaces of a pair of rolls. Is also performed at the same time. At this time, whether the concave portion is formed on one side or both sides of the metal plate is appropriately determined according to the purpose of use.
[0014]
Even if the metal plate with concave portions formed on the surface obtained in this way is cooled and commercialized as it is, the surface is not hardened, the finish is not smooth, the fatigue strength is low, etc. There are many things that can not tolerate.
[0015]
In this step, production may be performed while continuous casting is performed, or in the case of small-scale production or a material that is difficult to continuously cast, the metal ingot (ingot) may be produced while being subjected to slab rolling. In the case of a steel plate, a so-called thick plate having a plate thickness of 6 mm or more, a so-called middle plate having a plate thickness of 3 to 6 mm, and a so-called thin plate having a plate thickness of 3 mm or less are often distinguished. However, the manufacturing process does not basically differ due to such distinction, but in the case of a medium plate or a thin plate, a convex portion is provided on a roll in the middle of a hot strip mill, and a concave portion may be formed on the surface. it can.
[0016]
Then, as the next step, the metal material having the concave portions formed on the hot-worked surface is cooled to a temperature lower than the recrystallization temperature, and then at a temperature of room temperature or lower than the recrystallization temperature, that is, under the conditions of cold rolling. Preferably, it is rolled at room temperature. The surface is hardened by the cold rolling, the finish is smooth, the fatigue strength is improved, and the product has good dimensional accuracy and a flat surface.
[0017]
By this cold rolling, the thickness of the plate itself is reduced, and the depth of the recess formed in the previous step is reduced and the opening area is also increased. The weight of the metal plate is reduced by the amount of the concave portion, and the strength of the metal plate hardly changes or does not decrease so much depending on the size of the concave portion.
As a rolling mill used for cold rolling, a commonly used rolling mill can be used.
The above-described manufacturing method is based on the same method as that for manufacturing a so-called striped plate, and can be easily implemented using a conventional manufacturing apparatus.
[0019]
Cold rolling can also be rolled using a rolling straightener if rolling is not so required. As this rolling straightening machine, for example, a roller leveler is used. Since this leveler (rolling straightening machine) is usually in the form of a sheet material wound into a coil when receiving a steel sheet, it is not possible to process the sheet material as it is because it has dents and bends. For this reason, it is this leveler that is used, for example, to remove curl or to flatten a recess. A roller leveler that is most commonly used as a leveler is a roll leveler in which rolls of the same diameter are arranged in a staggered manner in two stages, with the engagement on the inlet side being deeper and the outlet side being gradually shallower. For this reason, the plate gradually decreases its curvature while repeatedly undergoing positive and negative bending, and the concave and bent parts between them gradually become flat, and the final roll comes out as a flat plate. . Since the meshing is deeper on the inlet side and gradually shallower on the outlet side, it is rolled as a whole, and the thickness is reduced and the length is lengthened by that much.
[0020]
According to the invention of the present application, it is possible to mass-produce a processed metal plate easily by combining the conventional hot working and cold working, and since the concave portion is formed on the manufactured surface, the conventional An excellent processed metal sheet that is lighter than a steel sheet or the like and that can be used for various purposes not found in a conventional steel sheet can be manufactured at low cost.
[0021]
Various kinds of metal plates can be used as a metal plate to be processed in the present invention. For example, iron, a metal selected from the group consisting of copper and aluminum or a metal material of an alloy thereof, more specifically, a steel plate, a stainless steel plate, a copper plate, a brass plate, a duralumin plate, an aluminum plate, and the like. . These materials can be appropriately selected from various materials according to the purpose of use, and can be appropriately selected according to the place to be used. Generally, a steel plate and a stainless steel plate are the most preferable materials from the viewpoint of versatility, but are not limited thereto.
[0022]
These metal plates are preferably subjected to a surface treatment, for example, a rust preventive treatment or other surface treatments, after being subjected to the processing treatment of the present invention.
[0023]
As the shape of the concave portion on the surface of the metal plate, a substantially semicircular shape or a substantially circular shape, a mark, a character, various patterns, and the like can be considered. These marks, characters, and patterns can be appropriately combined and used according to the purpose of use and the place to be used. For example, a company mark, a company name, a product name, and various other uses can be considered. When the purpose of use is not limited, a substantially circular shape is most preferable, and the size is appropriately determined according to the purpose of use. When a large number of concave portions having both short sides of a rectangle being semicircular are provided in the rolling direction, that is, when a directional concave portion is formed in a metal plate, a direction perpendicular to the rolling direction is provided. Since the strength is higher in the rolling direction than in the rolling direction, it can be used for applications that require directionality as the strength.
[0024]
The processed metal plate manufactured as described above has the following characteristics.
(1) Since the surface recess is formed, the weight is reduced as compared with a metal plate having the same size and the same thickness.
(2) Since the concave portions are formed on the surface, the surface area is increased as a result, and the heat radiation effect is large.
(3) Since the concave portions are formed on the surface, the adhesive force is increased, and there is an effect that the application of an adhesive, a paint, cement, or the like is not easy and the peeling is difficult.
(4) Since the concave portion is formed when the sound or light hits the metal plate, the reflection of sound or the reflection of light is irregularly reflected, so that there is a silencing effect and a slight quenching effect.
(5) Since the concave portion is formed on the surface, there is an effect of slip prevention and the like.
(6) When a plurality of directional concave portions having a short side of a rectangle having a semicircular shape in the rolling direction are formed in the rolling direction, the strength increases in the rolling direction. Can be used for required applications.
[0025]
In addition, compared to a metal plate of the same thickness, it is lighter and hardly loses its strength. Therefore, it is possible to reduce the weight of the metal plate as compared with the conventional one, and to reduce the manufacturing cost when used for various applications. And reduction of distribution costs.
[0026]
Because of such advantages, the metal plate of the present invention can be used for various applications and can be further processed into various structural materials and members. For example, outer frames of various home appliances, outer frames of various devices, and materials such as ordinary houses and shops (for example, interior materials such as wall materials, ceiling materials, product cases and shelves, and door materials and outer walls) , Roofing materials, exterior materials such as signboards), various members of various vehicles such as automobiles and trains (eg, step materials, interior materials, exterior materials, frames, chassis, floorboards, etc.), marine materials (eg, floorboards) Interior and exterior materials such as floors and walls), aircraft interior materials, factory materials (for example, walkways, warehouse shelves, interior and exterior materials, partitioning materials, flooring materials, etc.), building materials (for example, roofing materials) , Beams, columns, scaffolding pipes, door materials, etc.), various shapes (for example, flat steel, angle shapes, grooves, C shapes, Z shapes, etc.), guardrails, pipes (square pipes, round pipes, etc.) Scaffolding pipes), various chemical containers (enamelling) And the like.
[0027]
The present invention will be described with reference to the drawings. Here, a steel plate will be described as an example.
FIG. 1 is a diagram for explaining, in the case of manufacturing a processed metal plate having a concave portion on one surface from an unprocessed metal plate, in the order in which the metal plates are processed.
[0028]
As shown in FIG. 1A, the unprocessed metal plate 1 was heated to a temperature equal to or higher than the recrystallization temperature between the rolls having a convex portion on one surface of a pair of rolls as shown in FIG. 1B. Through the metal plate 1, a concave portion 3 of an arbitrary shape is formed on one surface of the metal plate by a convex portion of a roll. Then, the metal sheet thus hot-worked is cooled to a temperature lower than the recrystallization temperature (after annealing) and then cold-rolled at a temperature from room temperature to a temperature lower than the recrystallization temperature, preferably at room temperature. . During cold rolling, the thickness of the plate itself becomes thinner, and the recesses formed in the previous step are formed with the recesses 4 having a smaller depth and a larger opening area at the same time. Then, the raw material thus obtained is annealed, that is, annealed. In this annealing treatment, a crystal having no distortion is grown by heating and holding in a reducing atmosphere gas, and a material suitable for a target standard and application is produced. Then, the annealed material is subjected to finish pass rolling. This temper rolling reduces the elongation of the yield point by giving a slight processing effect, and suppresses the so-called waist break and the stretcher strain phenomenon. FIG. 1C shows the metal plate 2 thus manufactured. The weight of the metal plate 2 is reduced by the amount of the concave portion, and the strength of the metal plate hardly changes or does not decrease so much depending on the size of the concave portion.
[0029]
Note that the stretcher-strain phenomenon will be described in some detail. In a tensile test of a steel sheet, traces of misalignment of lattices, so-called strip bands, appear on the surface of a crystal lattice where the bonding force is partially weak at the yield point. Strip bands may also appear in the pressing of a steel sheet. In this case, the sliding lines between the lattices are complicated, so that the surface of the steel sheet looks like a flame pattern. This is called the stretcher-strain phenomenon or stretcher strain. The appearance of this phenomenon not only makes the appearance of the processed product ugly, but also cannot be hidden by surface treatments including subsequent painting.
[0030]
【The invention's effect】
According to the present invention, the following effects can be obtained by forming a concave portion having an arbitrary shape on one side or both sides of a metal plate.
(1) Since the concave portion is formed on the surface, the weight is reduced as compared with a metal plate having the same size and the same thickness.
(2) Since the concave portions are formed on the surface, the surface area increases, and the heat radiation effect is large.
(3) Further, when an adhesive, paint, cement, or the like is applied, the surface area is large, so that the adhesive force is increased, and there is such an effect that the adhesive does not easily come off into the concave portion.
(4) When sound or light hits the metal plate, it is irregularly reflected by the concave portion, so that a kind of matting effect is produced and a sound damping effect can be expected.
(5) Since there is a concave portion on the surface, an effect of preventing slippage occurs.
(6) Because of having the above-mentioned characteristics, applications as molding materials and interior / exterior materials are further expanded.
[Brief description of the drawings]
FIG. 1 is a diagram schematically illustrating the order in which metal plates are processed when manufacturing a processed metal plate having a concave portion on one side from an unprocessed metal plate.
FIG. 1A shows an unprocessed metal plate.
FIG. 1B shows a metal plate in which a concave portion is formed by hot working.
FIG. 1 (c) shows a processed metal plate obtained by cold rolling the metal plate of FIG. 1 (b).
[Explanation of symbols]
1: unprocessed metal plate 2: processed metal plate 3: concave portion 4: concave portion of processed metal plate

Claims (8)

The metal plate heated to the recrystallization temperature or higher is passed between rolls having convex portions on one or both surfaces of a pair of rolls, and a concave portion of an arbitrary shape is formed on one or both surfaces of the metal plate. A method for producing a processed metal sheet having a concave portion formed on a surface thereof, wherein the processed metal sheet is rolled at a temperature from room temperature to a temperature lower than a recrystallization temperature. 2. The method according to claim 1, wherein rolling is performed at room temperature. 2. The method according to claim 1, wherein the metal plate is a metal selected from the group consisting of iron, copper and aluminum or an alloy thereof. The method according to claim 3, wherein the metal plate is selected from the group consisting of a steel plate, a stainless steel plate, a copper plate, a brass plate, and a duralumin plate. A metal plate heated to a temperature higher than the recrystallization temperature is passed between rolls having convex portions on one or both surfaces of a pair of rolls to form a concave portion of an arbitrary shape on one or both surfaces of the metal plate, and then at room temperature or below. A processed metal plate having a concave portion formed on a surface formed by rolling at a temperature lower than a recrystallization temperature. The processed metal sheet according to claim 5, wherein a concave portion is formed on a surface at a normal rolling temperature. 7. The processed metal plate according to claim 5, wherein the metal plate is a metal selected from the group consisting of iron, copper and aluminum or an alloy thereof. The processed metal plate according to claim 5, wherein the metal plate is selected from the group consisting of a steel plate, a stainless steel plate, a copper plate, a brass plate, and a duralumin plate.

Images